T-Shirt Design Tutorial T-Shirt Printing Detailed Process Introduction B

Detailed description of T-shirt printing process B

Three, digital direct plate making technology

There are three main applications of computer to plate (CTP) in screen printing.

1. ink jet (wax) CTP plate making. The technology is to print the image on the prefabricated version of the screen precoated optical adhesive by means of computer controlled lithographic inkjet or wax spray printer. This ink image replaces the effect of plate negatives, exposing and developing the printing screen. The United States and Switzerland have all produced ink jet (wax) CTP plate making machines. Gao Bo (Gerber) in 1992 produced a C T P plate making system for T-shirt printing plate making: Screen Jet (the largest panel area 65cmx95cm), and now it has sold hundreds of units in the world.
2. spray glue CTP plate making. Unlike the inkjet CTP, the photosensitive polymer glue is sprayed on the screen. The image is exactly the opposite of that of inkjet printing.
3. laser CTP plate making. A computer controlled optical system is used to scan the prefabricated photosensitive screen with a modulated laser beam. The point of the laser beam scanning is exposure curing, and then becomes a printed screen after washing.

Compared with the current plate making technology, CTP technology has obvious advantages. The process of making plate negatives has been cancelled, which is much more convenient and fast, and the quality has been improved.

Four. Screen making

1. screen making materials and tools

The screen is made up of mesh frame, silk screen and photosensitive adhesive. The materials used include nail net nails, sticky mesh adhesive, sealing tape and so on. The main tools for making screen are: wire mesh, net clamp, nail net, glue gluing machine, glue scraper bucket, dryer, printer, water jet and so on.

T-shirt printing usually saves a certain number of pattern plates and has a long shelf life. Generally speaking, the net frame is considered from an economic point of view. Wood frame material is good for Chinese fir, too hard for wood nails. It is difficult to mesh nails. Loose wood is easy to deform and loose. The use of nail net is faster and more convenient than sticky mesh adhesive, but the screen mesh stability is poor. If you can combine the two best. Because most of the T-shirt printing uses waterborne coatings, the polyester mesh should be used, because nylon mesh is easy to expand and relax when it meets water.

2. net

The screen technology of T - shirt screen is the same as that of ordinary screen. However, it should be noted that the screen used for different printing materials should be appropriate. If there is a set of net plate, that is, water slurry and foam printing material, gold and silver pulp printing, water slurry should be 120 mesh screen, foam pulp, gold and silver pulp should be 80~100 mesh screen, and net plate is recommended to use 140 screen. For printing with chemical fiber or purified fiber fabric, 140~160 mesh mesh should be used for waterborne pulp printing, and 240 mesh for printing ink.

3. photosensitive plate making

Water based printing paste uses water sensitive glue, thermosetting ink and solvent photosensitive glue are all available. Solvent soluble photoresist is preferred because stripping is easier. In the screen printing photosensitive glue should pay attention to the adhesive layer is uniform, the general printing surface glue layer is thicker than the scratch surface glue layer. The thickness of photographic film is quite different from that of printing material, fabric and figure.

(1) the screen film should be booklet. If the film is thick, there will be more printed materials, which will make paste paste more easily.
(2) chemical fiber fabrics, whether they use ink or waterborne pulp, and thermosetting ink, should be kept on the screen, so as to prevent the paste from printing. However, if the fabric of Oxford is more coarse (more than 400 denier, used for school bags, etc.), the film can be thicker.
(3) screen printing must be thick for printing and foaming printing. Especially when printing paste on dark fabric and rough fabric, the screen layer should be about 3 times the thickness of the screen adhesive layer (0.3mm or above), so that the paste will be strong covering and smooth. The production and process requirements of the T-shirt printing screen are basically the same as that of the conventional screen making. However, since the screen is thick or thick with a mesh of about 80 mesh, it is necessary to master the exposure time when printing, so as to avoid the aliasing of the image. Prepress technology not only determines the good or bad of T-shirt production, but also determines its success or failure. In operation, a beautifully designed T-shirt, which is not very well printed, can still be sold, because consumers know little about printing technology. But if the design of a T-shirt is not good enough, you can print it more finely, and the quality of the fabric will be better, and no one will buy it. Because buying T-shirts is culture, T-shirt design is worth more than T shirt. Therefore, the design of T-shirt pattern plays an important role in the composition of T-shirt. Of course, this is not to say that the quality of printing is not important. T-shirts with high print quality, even those who do not know the printing technology, will be able to distinguish their stop times from their feelings. We conclude a sentence in practice: pattern Decide whether to sell; decide whether to sell well (price).

In addition, in terms of exposure to print, our enterprises usually do not have very precise time requirements for exposure. However, if we use the print test table to test, we will find that the control of the printing time may have little effect on the rough lines, but it has great influence on the fine lines and the mesh points. If we want to make high quality web plates, we must seriously determine the exposure time. It is the same set of four color screen negatives. Due to the different density of dots, the exposure time should be different. The exposure time of low tone screen should be a little shorter. The exposure time of high-profile screen should be a bit longer to avoid high light spot being washed away. In addition to computer production, pre press technology can be said to be not difficult to master. The important thing is to be serious and keep improving. The 1 issue of T-shirts published in screen printing in 2000 can be classified from two aspects: business scope and printing process.

T-shirts can be classified from two aspects: business scope and printing process.

T-shirt classification:

1. T-shirts, namely T-shirts, which are targeted at social consumers to enter conventional commodity circulation channels.
2. T-shirt, a T-shirt for the purpose of carrying advertisements, belongs to advertising media. Its contents can be commercial advertisements or political advertisements, public service advertisements, etc.
3. tourism t-shirt t-shirt tourism has a considerable position in the souvenir market abroad, where tourist attractions, historical sites and cultural landscapes will be accompanied by a large number of tourist T-shirts and T-shirts. Tourism T-shirt is the best embodiment of national culture, regional culture, customs, culture, natural landscape culture and political history and culture.
4. group T-shirts - large to international social organizations, small to a team, band, own T-shirt is always proud.
5. theme T-shirts - major historical themes, cultural and entertainment events, political activities and celebrity fun will also be reflected on T-shirts, satisfying people's desire for participation and remembrance. In recent years, such as the theme of 97 Hongkong's return, the theme of the 98 World Cup has brought a huge tide of T-shirts, which has achieved considerable social and economic benefits.
6. brand T-shirts, many famous brand clothes, often produce their own brand T-shirts to achieve double fame.

T-shirts can be printed according to the following categories:

1. the local printing T-shirts are printed mainly on the front, back, front left upper chest, cuffs, back collar and so on. Local printed T-shirts account for more than 70% of T-shirts.
2. the printed T-SHIRT - printed T-shirt is divided into three categories: cloth printing, cutting printing and garment printing. Among them, all the printed garments need to be produced by special T-shirt printing machines, which represent the highest level of technical equipment for T-shirts printing.
3. waterborne pigment printing - mainly used for white T-shirt printing.
4. pulp printing - mainly used for dyeing T-shirt printing.
5. thermosetting ink printing - all kinds of fabrics (including chemical fiber) are suitable, is the most promising T-shirt printing ink, because it is suitable for the use of advanced computer design, adapt to the adoption of modern automatic production mode, symbol of contemporary technology development trend. Especially on the dark fabric, the effect of printing is more difficult than that of the glue, which speeds up the speed of the glue withdrawal from the T-shirt printing.
6. transfer printing T-shirt mainly consists of two types: hot melt adhesive and deinking.
7. the special types of pigment printing are mainly printing, flocking printing, photosensitive, water sensitive, heat sensitive pigment printing, luminous pigment printing, fragrant pigment printing, multicolored decorative film (laser chip) printing, etc.
8. special processing, such as resist printing, discharge printing and batik dyeing. Tie-dyed T-shirt and so on.
9. embroidered T-shirt
10. composite technology - what are the requirements for the pixels of the heat transfer picture and material processed by the above printing and processing technology in a T-shirt pattern? First, the size of the production is set up, and the resolution is generally 200-300. For the selection of image material, we suggest that it is best to use 3 million pixel digital photos, and the pictures downloaded on the Internet or photos are usually 75.